BASIS OF PRESENTATION (Policies)	6 Months Ended
Jun. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Management of Booking Holdings Inc. (the "Company") is responsible for the Unaudited Consolidated Financial Statements included in this document, which have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") and include all normal and recurring adjustments that management of the Company considers necessary for a fair presentation of its financial position and operating results. The Company prepared the Unaudited Consolidated Financial Statements following the requirements of the Securities and Exchange Commission for interim reporting. As permitted under those rules, the Company condensed or omitted certain footnotes or other financial information that are normally required by U.S. GAAP for annual financial statements. These Unaudited Consolidated Financial Statements should be read in combination with the Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2023. The Unaudited Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries, including acquired businesses from the dates of acquisition. All intercompany accounts and transactions have been eliminated in consolidation. The functional currency of the Company's subsidiaries is generally the respective local currency. For international operations, assets and liabilities are translated into U.S. Dollars at the rate of exchange existing at the balance sheet date. Income statement amounts are translated at monthly average exchange rates applicable for the period. Translation gains and losses are included as a component of "Accumulated other comprehensive loss" in the accompanying Consolidated Balance Sheets. Foreign currency transaction gains and losses are included in "Other income (expense), net" in the Unaudited Consolidated Statements of Operations. Revenues, expenses, assets, and liabilities can vary during each quarter of the year. Therefore, the results and trends in these interim financial statements may not be the same as those for any subsequent quarter or the full year.
Reclassification	Reclassification Certain amounts from prior periods have been reclassified to conform to the current period presentation. These include the reclassification of certain indirect taxes, primarily digital services taxes, between "General and administrative" expenses and "Sales and other expenses" in the Unaudited Consolidated Statements of Operations. See Notes 2 and 21 to the Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2023.
Recent Accounting Pronouncements	Recent Accounting Pronouncements See "Recent Accounting Pronouncements Adopted" and "Other Recent Accounting Pronouncements" in Note 2 to the Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2023. Improved guidance to help determine transactions to be accounted for as share-based payment arrangements In March 2024, the Financial Accounting Standards Board issued an Accounting Standards Update adding illustrative guidance to help entities determine whether profits interest and similar awards should be accounted for as share-based payment arrangements within the scope of the Accounting Standards Codification ("ASC") 718, Compensation - Stock Compensation. The update is effective for annual and interim financial statements beginning with the fiscal year 2025. The Company is currently evaluating the impact of the update on its Consolidated Financial Statements.
Earnings Per Share	The Company computes basic net income per share by dividing net income applicable to common stockholders by the weighted-average number of common shares outstanding during the period. Diluted net income per share is based upon the weighted-average number of common and common equivalent shares outstanding during the period. Only dilutive common equivalent shares that decrease the net income per share are included in the computation of diluted net income per share. Common equivalent shares related to stock options, restricted stock units, and performance share units are calculated using the treasury stock method. Performance share units are included in the weighted-average common equivalent shares based on the number of shares that would be issued if the end of the reporting period were the end of the performance period, if the result would be dilutive. The Company's convertible senior notes have net share settlement features requiring the Company, upon conversion, to settle the principal amount of the debt for cash and the conversion premium for cash or shares of the Company's common stock, at the Company's option. If the conversion prices for the convertible senior notes exceed the Company's average stock price for the period, the convertible senior notes generally have no impact on diluted net income per share. The Company uses the if-converted method for the convertible senior notes in the calculation of diluted net income per share.
Definite-lived intangible assets amortization	Intangible assets are amortized on a straight-line basis.
Income Tax	Income tax expense consists of U.S. and international income taxes, determined using an estimate of the Company's annual effective tax rate, which is based upon the applicable tax rates and tax laws of the countries in which the income is generated. A deferred tax liability is recognized for all taxable temporary differences, and a deferred tax asset is recognized for all deductible temporary differences and operating loss and tax credit carryforwards. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized. The Company considers many factors when assessing the likelihood of future realization of the deferred tax assets, including its recent cumulative earnings experience by taxing jurisdiction, expectations of future income, tax planning strategies, the carryforward periods available for tax reporting purposes, and other relevant factors.

BASIS OF PRESENTATION (Policies)

6 Months Ended

Jun. 30, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Management of Booking Holdings Inc. (the "Company") is responsible for the Unaudited Consolidated Financial Statements included in this document, which have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") and include all normal and recurring adjustments that management of the Company considers necessary for a fair presentation of its financial position and operating results. The Company prepared the Unaudited Consolidated Financial Statements following the requirements of the Securities and Exchange Commission for interim reporting. As permitted under those rules, the Company condensed or omitted certain footnotes or other financial information that are normally required by U.S. GAAP for annual financial statements. These Unaudited Consolidated Financial Statements should be read in combination with the Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2023.

The Unaudited Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries, including acquired businesses from the dates of acquisition. All intercompany accounts and transactions have been eliminated in consolidation. The functional currency of the Company's subsidiaries is generally the respective local currency. For international operations, assets and liabilities are translated into U.S. Dollars at the rate of exchange existing at the balance sheet date. Income statement amounts are translated at monthly average exchange rates applicable for the period. Translation gains and losses are included as a component of "Accumulated other comprehensive loss" in the accompanying Consolidated Balance Sheets. Foreign currency transaction gains and losses are included in "Other income (expense), net" in the Unaudited Consolidated Statements of Operations.

Revenues, expenses, assets, and liabilities can vary during each quarter of the year. Therefore, the results and trends in these interim financial statements may not be the same as those for any subsequent quarter or the full year.

Reclassification

Certain amounts from prior periods have been reclassified to conform to the current period presentation. These include the reclassification of certain indirect taxes, primarily digital services taxes, between "General and administrative" expenses and "Sales and other expenses" in the Unaudited Consolidated Statements of Operations. See Notes 2 and 21 to the Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2023.

Recent Accounting Pronouncements

See "Recent Accounting Pronouncements Adopted" and "Other Recent Accounting Pronouncements" in Note 2 to the Consolidated Financial Statements in the Company's Annual Report on Form 10-K for the year ended December 31, 2023.

Improved guidance to help determine transactions to be accounted for as share-based payment arrangements

In March 2024, the Financial Accounting Standards Board issued an Accounting Standards Update adding illustrative guidance to help entities determine whether profits interest and similar awards should be accounted for as share-based payment arrangements within the scope of the Accounting Standards Codification ("ASC") 718, Compensation - Stock Compensation. The update is effective for annual and interim financial statements beginning with the fiscal year 2025. The Company is currently evaluating the impact of the update on its Consolidated Financial Statements.

Earnings Per Share

The Company computes basic net income per share by dividing net income applicable to common stockholders by the weighted-average number of common shares outstanding during the period. Diluted net income per share is based upon the weighted-average number of common and common equivalent shares outstanding during the period. Only dilutive common equivalent shares that decrease the net income per share are included in the computation of diluted net income per share.

Common equivalent shares related to stock options, restricted stock units, and performance share units are calculated using the treasury stock method. Performance share units are included in the weighted-average common equivalent shares based on the number of shares that would be issued if the end of the reporting period were the end of the performance period, if the result would be dilutive.

The Company's convertible senior notes have net share settlement features requiring the Company, upon conversion, to settle the principal amount of the debt for cash and the conversion premium for cash or shares of the Company's common stock, at the Company's option. If the conversion prices for the convertible senior notes exceed the Company's average stock price for the period, the convertible senior notes generally have no impact on diluted net income per share. The Company uses the if-converted method for the convertible senior notes in the calculation of diluted net income per share.

Definite-lived intangible assets amortization

Intangible assets are amortized on a straight-line basis.

Income Tax

Income tax expense consists of U.S. and international income taxes, determined using an estimate of the Company's annual effective tax rate, which is based upon the applicable tax rates and tax laws of the countries in which the income is generated. A deferred tax liability is recognized for all taxable temporary differences, and a deferred tax asset is recognized for all deductible temporary differences and operating loss and tax credit carryforwards. A valuation allowance is provided when it is more likely than not that some portion or all of a deferred tax asset will not be realized. The Company considers many factors when assessing the likelihood of future realization of the deferred tax assets, including its recent cumulative earnings experience by taxing jurisdiction, expectations of future income, tax planning strategies, the carryforward periods available for tax reporting purposes, and other relevant factors.

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

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